Boudoukha H.,Laboratory of Nonmetal Materials |
Djabi S.,Laboratoire of the Photonic Systems and Nonlinear Optics |
Coquillet B.,Laboratory LTDS Central
Experimental Techniques | Year: 2010
The fatigue behavior of Z12CNS25-20 or AISI-310 stainless heat-resisting steel was studied during a microdynamic indentation test in controlled energy to simulate the damage induced by the phenomenon of wear and fatigue in the environment and turbojets. The surface tribological transformations (STT) for each cycle of impacts was also studied and the micropercussion tests were carried out under various conditions of spherical cermet impactor, force of impact, number of cycles of impacts, and lowering time. The results show a damage of the grains due to the elastoplastic deformation of metal and partially work-hardened structure of the impacted zone. Analysis of deformation by superficial surface transformation of the material leads to an extremely hard work-hardened layer which withstands repeated shocks.